head unit overheat in previa

I just installed a new alpine head unit CDA-9856 in my previa and after about an hour and a half it shut down due to hi temp.This has happend twice since i installed it 2 days ago. Has anyone else had this problem? Could the head unit be defective or do i need to insulate it from the air vents? previa guys will know what i mean.

maybe theres something wrong with the electrical. maybe my buddy could check it out if you're in norcal.

Nope St louis born'n'raised
Its a new unit so i'll probably pull it and return it.

Same thing happened to my Alpine IVA900...it just basically fried its own circuits. :tickedoff:
Had to send it to Alpine for repairs to "upgrade" as they say it, upgrade the base board.

had the say thing, similar problems with the newer alpines...

needless to say, i wont buy a alpine again